The question is does the L-590 AX sound the same as the L-590a II but with different features(no loudness but does have seperate button, does not hide the knobs on the front like the L-590a II) or has Luxman managed to take the L-590 AX to the next level?

Luxman has also released the DA-200 USB DAC by combining the P-1u headphone amp and the D-05.